Primes of the form k*(k+2)/3 - 3, k>2.

Terms

a(0) =2a(1) =5a(2) =13a(3) =37a(4) =53a(5) =173a(6) =277a(7) =317a(8) =557a(9) =613a(10) =733a(11) =797a(12) =1237a(13) =1493a(14) =1973a(15) =2293a(16) =3533a(17) =4253a(18) =4877a(19) =5717a(20) =9293a(21) =9973a(22) =12157a(23) =12413a(24) =14557a(25) =16573a(26) =17477a(27) =19037a(28) =20333a(29) =22013